Belting.



No. 770,003. PATENTED SEPT. 1s, 1904. T. GINGRAS.

BBLTING.

APPLIOATION FILED JAN. 8,'1904.

N0 MOD'BL.

llNiTnn STATES Patented September 13, 1904.

BELTlNG- SPECIFICATION forming part of Letters Patent No. 770,063,dated. September 13, 1904.

l Application flled January 8, 1904.

To a/Z whom, t may concern.'

Be it known that I, TIMOTHY GINGRAs, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented new and useful Improvements in Belting, of which the followingis a specification.

This invention relates to an improved belting for transmitting' power,and more particularly to belts composed of layers of fabric.

The object of my invention is to produce a strong and durable belt ofthis character which is not liable to stretch and which possesses ahig'h deg'ree of resilience and fiexibility.

In the accompanying' drawings, Figure l is a sectional perspective viewof a piece of my improved belting'. Fig. 2 is a cross-section thereof.Fig'. 3 is a section similar to Fig. 2, showing a belt in which thefabric layers each consist of a plurality 0f plies.

Similar letters of reference indicate corresponding parts in all thefigures.

The belt consists of two separate layers A A of fabric, preferablycotton, woven with selvages at both edges, so that the belt has unfoldeduniform edges. The layers of the belt may each be composed of one ormore plies, according to the desired thickness of the belt; but in allcases it is desirable to employ but two layers having a like number ofplies in order to preserve the requisite flexibility. Fig. l shows abelt in which each layer consists of a single ply, while Fig. 3 shows abelt in which each layer contains three plies.,

The two fabric layers of the belt are'united by an intermediate film orthin layer B of suitable adliesive material, the preferred cement beinga composition of fish-glue and hide-glue in the proportion of one partof fish-glue to two parts of hide-glue. This uniting-film forms acartilag'e-like layer of great strength,

which in addition tol forming a powerful binder stays the fabric,increases the strength of the belt, and prevents stretching andshrinkage of the same. It also possesses a high deg'ree of fiexibilityand resilience, which' permits the belt to conform readily to pulleys ofcomparatively small diameter and gives the same a tendency to assume itsoriginal position after passing around a pulley, thus providing a beltwhich combines the advantages Serial No. 188,190. (No model.)

of strength, durability, and minimum resistance in traveling overpulleys.

Besides cementing' the fabric layers together they may be further unitedby rows of stitching O, extending lengthwise of the belt, as shown, andarranged from a quarter of an inch to one inch apart. Ordinarily thisadditional fastening is not necessary; but it is preferably employed ina belting exposed to moisture or to the weather.

Tn order to preserve the belt from decay and mildew and render itwaterproof, the same is treated with a suitable filler which willpractically withstand the effects of heat and moisture and yet notimpair the strength of the belt. T prefer to use for this purpose afiller composed of equal parts of pine-tar and parafhn-wax orparaffin-oil. These ing'redients are heated and thoroughly mixed, andthe belt is treated therewith by dipping it in the mixture or byapplying the latter to the belt with a brush. After being filled thebelt may receive a finishing-coat of the same composition as the fillerfor giving' it a smooth surface.

In manufacturing' the belting the fabric layers are first stretched, andwhile und er tension they are cemented together by the adhesive orcartilage-like film hereinbefore described. After properly drying andseasoning the cemented layers they are next stitched together, ifstitching is employed, after which the belt is treated with thefiller,which latter permeates the layers from both sides of the belt tothe central binding-film B. When the filler is dry and well seasoned,the finishingcoat is applied to the belt.

I claim as my invention- A belt comprising two separate layers of fabrichaving a like number of plies and treated with a filler composed ofpine-tar and paraffinwax, and a cartilage-like film of fish-glue andhide-glue arranged centrally between said two layers and uniting thesame, substantially as set forth.

Vitness my hand this 19th day of Decembei, 1903.

TIMOTHY GINGRAS.

Witnesses:

CARL F. GEYER, EMMA M. GRAHAM.

